Inconsistent axis label code style

[trevorcampbell]

I've noticed that the code isn't consistent between alt.Y('blah').title('blah') and alt.Y('blah', title='blah') -- I noticed this in inference but it could be more pervasive. I think the newer style is alt.Y('blah').title('blah'), so we should switch everything over to that.

I think all the instances of that inconsistency are in remove-cell tagged cells, so not the end of the world, but it would be good to ensure that code is consistent throughout, even in hidden cells

[joelostblom]

Yup I almost only fixed what was visible in the book since the other syntax is still valid and it made the important changes stand out more. I agree it would be nice to have it the same everywhere, especially when grepping for something, but agree that this is low prio.